Bruno API Client Review: The Git-Friendly Open Source Alternative to Postman

Bruno API Client Review: The Git-Friendly Open Source Alternative to Postman

API testing tools have quietly become some of the most important software in a developer’s daily workflow. Postman, the category leader, reported more than 35 million registered users by 2024, and Insomnia, its closest commercial rival, has long held a loyal following. Yet a growing number of teams are looking for something different: a client that stores requests as plain text files they can version, review, and merge like any other code.

Bruno is the most prominent challenger built around exactly that idea. Since its launch in 2022, the open-source project has accumulated tens of thousands of GitHub stars and a devoted community of developers who were tired of syncing their API collections through proprietary cloud accounts. This review examines what Bruno does well, where it falls short, and which teams are most likely to benefit from switching.

What Bruno Actually Is

Bruno is a desktop API client—comparable in purpose to Postman or Insomnia—that runs on macOS, Windows, and Linux. You use it to compose HTTP requests, inspect responses, chain requests together, and organize everything into collections.

The defining design decision is where those collections live. Instead of storing requests in a cloud database or a proprietary binary format, Bruno saves each request as a .bru text file inside a folder on your filesystem. A collection is simply a directory. You can open that directory in Git, commit it, branch it, and push it to GitHub or GitLab without any export step.

The file format is deliberately readable. A simple GET request looks roughly like this:

meta {
  name: Get Users
  type: http
  seq: 1
}

get {
  url: https://api.example.com/users
  body: none
  auth: none
}

That readability matters more than it might seem. Diffs are meaningful, merge conflicts are resolvable by hand, and a code reviewer can see exactly what changed in an API collection without opening a GUI.

Bruno is available in two forms: a free open-source edition under the MIT license, and a paid “Golden Edition” that adds features like a built-in visual Git client and additional collaboration tooling. The core client—request building, scripting, environments, the Bru file format—is fully open source.

Where Bruno Shines

Git-native collaboration. This is the headline feature, and it holds up in practice. Teams that already review code through pull requests can apply the same workflow to API collections. When a backend engineer changes an endpoint, the corresponding request change arrives in the same PR as the server code. That tight coupling is difficult to achieve with cloud-synced collections.

No account required. Bruno works entirely offline out of the box. There is no sign-up wall, no telemetry by default, and no requirement to route your API keys through a third-party service. For security-conscious organizations—or anyone working with internal endpoints—that is a meaningful difference.

Fast and lightweight. The app is built on Electron, so it is not as lean as a native binary, but it launches quickly and feels responsive. Users migrating from Postman frequently cite startup speed and lower memory usage as an immediate improvement.

Familiar scripting. Bruno supports pre-request and post-response scripts written in JavaScript, with APIs that will feel recognizable to anyone coming from Postman. You can extract a token from one response, store it in a variable, and reuse it in the next request—the standard pattern for authenticated test flows.

Solid import support. Bruno can import collections from Postman, Insomnia, OpenAPI specs, and several other formats. Migration is rarely frictionless, but the importer handles the bulk of the work.

Where It Falls Short

A smaller ecosystem. Postman’s public API network, mock servers, and monitoring features have no direct equivalent in Bruno. If your workflow depends on sharing collections publicly or running scheduled monitors in the cloud, you will need to replace those pieces with something else—often a CI pipeline or a dedicated tool.

Collaboration requires infrastructure. The Git-based model is elegant, but it assumes your team already uses Git and is comfortable with it. Less technical stakeholders—product managers, QA staff without version control experience—may find the workflow less approachable than clicking a shared workspace link.

Some rough edges. Bruno is a younger project, and it shows in places. Certain advanced features, such as complex authentication flows or detailed test reporting, are less polished than in mature commercial tools. The community is active and releases are frequent, so this gap is narrowing, but it is worth setting expectations.

The paid tier question. Some capabilities that Postman users take for granted—such as a graphical Git interface—sit behind the Golden Edition. The free version remains genuinely usable, but teams should review the feature comparison before committing.

Bruno vs. Postman: A Practical Comparison

Dimension	Bruno	Postman
Storage format	Plain-text .bru files	Cloud-synced proprietary format
Account required	No	Yes for most collaboration
Open source	Yes (MIT)	No
Collaboration model	Git	Built-in workspaces
Mock servers & monitoring	Not built in	Yes
Public API network	No	Yes
Price	Free; paid tier optional	Free tier; paid plans for teams

The comparison is not really “better or worse” so much as “different priorities.” Postman optimizes for a broad, integrated platform with enterprise features. Bruno optimizes for developers who want their API collections treated like source code.

Who Should Consider Switching

Bruno tends to fit best with small to mid-sized engineering teams that already live in Git, value data ownership, and do not need cloud-hosted monitoring or a public API directory. Backend developers, platform teams, and open-source maintainers are natural adopters.

Teams deeply invested in Postman’s broader platform—particularly those relying on mock servers, scheduled monitors, or non-technical collaborators—will likely find a full migration disruptive. A reasonable middle path is to trial Bruno on a single project and see whether the Git workflow delivers the benefits it promises.

The Bottom Line

Bruno makes a convincing case that API collections belong in version control alongside the code they test. Its plain-text format, offline-first design, and open-source license address real frustrations that have built up around cloud-synced alternatives. It is not yet a feature-for-feature replacement for Postman, and teams with heavy platform dependencies should weigh that carefully.

For developers who have ever wished their API client behaved more like their code editor and less like a SaaS product, Bruno is worth a serious look. The project is young, actively developed, and pointed in a direction that a lot of engineers have been asking for.